Artículo
Influence of AC fields and electrical conduction mechanisms on the flash-onset temperature: Electronic (BiFeO3) vs. ionic conductors (8YSZ)
Autor/es | Molina Molina, Sandra
Perejón Pazo, Antonio Pérez Maqueda, Luis Allan Sánchez Jiménez, Pedro Enrique |
Departamento | Universidad de Sevilla. Departamento de Química Inorgánica |
Fecha de publicación | 2022 |
Fecha de depósito | 2023-04-21 |
Publicado en |
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Resumen | This work aims to clarify the influence of AC (up to 50 kHz) vs DC fields on the flash-onset temperature, emphasizing the role of the electrical conduction mechanism. BiFeO3 (BFO) is used as an example of electronic conductor ... This work aims to clarify the influence of AC (up to 50 kHz) vs DC fields on the flash-onset temperature, emphasizing the role of the electrical conduction mechanism. BiFeO3 (BFO) is used as an example of electronic conductor while 8-mol % Yttria-stabilized zirconia (8YSZ) is used as an example of ionic conductor. For 8YSZ, a frequency dependence of the flash-onset temperature and flash-induced heating is observed. This is consistent with the different contributions found in the total electrical response of 8YSZ as characterized by impedance spectroscopy measurements. Estimations based on the blackbody radiation model suggest that 8YSZ samples attain higher temperatures under AC fields due to a more efficient heating. Moreover, a noticeable decrease in the activation energy for the electrical conduction after the flash is triggered is attributed to electronic conduction. Meanwhile, the lack of frequency response and insensitiveness to the type of electrical field found in the case of BFO can be attributed to its mainly electronic bulk conduction. |
Agencias financiadoras | Ministerio de Ciencia e Innovación (MICIN). España Junta de Andalucía Consejo Superior de Investigaciones Científicas (CSIC) |
Identificador del proyecto | TQ2017-83602-C2-1-R
P18-FR-1087 US-1262507 201960E092 202060I004 |
Cita | Molina Molina, S., Perejón Pazo, A., Pérez Maqueda, L.A. y Sánchez Jiménez, P.E. (2022). Influence of AC fields and electrical conduction mechanisms on the flash-onset temperature: Electronic (BiFeO3) vs. ionic conductors (8YSZ). Ceramics International, 49 (9), 14834-14843. https://doi.org/10.1016/j.ceramint.2022.06.242. |
Ficheros | Tamaño | Formato | Ver | Descripción |
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Influence of AC fields.pdf | 6.411Mb | [PDF] | Ver/ | |